mirror of
https://github.com/mozilla/pdf.js.git
synced 2025-04-19 06:38:07 +02:00
2f828c7bf4
This patch is adding some code in order to extract a drawing as curves from an image. The algorithm is basically the following: - reduce the dimensions - make it gray - apply a bilateral filter in order to add some blurryness while keeping the edges - compute the histogram - guess what's the background color which should contain a large majority of the pixels - make a binary image - extract the contours in using the Suzuki algorithm - apply the Douglas-Peucker algorithm in order to reduce the number of points The algorithm is improvable but it should work pretty well if there's a clear difference between the background and the drawing. In a v2 we could use a ML model in order to improve the extraction. There's few changes related to the UI in order to make the tool usable, but they're very basic for the moment.
650 lines
17 KiB
JavaScript
650 lines
17 KiB
JavaScript
/* Copyright 2018 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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if (typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) {
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// eslint-disable-next-line no-var
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var compatParams = new Map();
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if (
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typeof PDFJSDev !== "undefined" &&
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PDFJSDev.test("LIB") &&
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typeof navigator === "undefined"
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) {
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globalThis.navigator = Object.create(null);
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}
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const userAgent = navigator.userAgent || "";
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const platform = navigator.platform || "";
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const maxTouchPoints = navigator.maxTouchPoints || 1;
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const isAndroid = /Android/.test(userAgent);
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const isIOS =
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/\b(iPad|iPhone|iPod)(?=;)/.test(userAgent) ||
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(platform === "MacIntel" && maxTouchPoints > 1);
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// Limit canvas size to 5 mega-pixels on mobile.
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// Support: Android, iOS
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(function () {
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if (isIOS || isAndroid) {
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compatParams.set("maxCanvasPixels", 5242880);
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}
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})();
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// Don't use system fonts on Android (issue 18210).
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// Support: Android
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(function () {
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if (isAndroid) {
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compatParams.set("useSystemFonts", false);
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}
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})();
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}
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const OptionKind = {
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BROWSER: 0x01,
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VIEWER: 0x02,
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API: 0x04,
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WORKER: 0x08,
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EVENT_DISPATCH: 0x10,
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PREFERENCE: 0x80,
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};
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// Should only be used with options that allow multiple types.
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const Type = {
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BOOLEAN: 0x01,
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NUMBER: 0x02,
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OBJECT: 0x04,
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STRING: 0x08,
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UNDEFINED: 0x10,
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};
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/**
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* NOTE: These options are used to generate the `default_preferences.json` file,
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* see `OptionKind.PREFERENCE`, hence the values below must use only
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* primitive types and cannot rely on any imported types.
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*/
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const defaultOptions = {
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allowedGlobalEvents: {
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/** @type {Object} */
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value: null,
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kind: OptionKind.BROWSER,
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},
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canvasMaxAreaInBytes: {
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/** @type {number} */
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value: -1,
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kind: OptionKind.BROWSER + OptionKind.API,
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},
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isInAutomation: {
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/** @type {boolean} */
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value: false,
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kind: OptionKind.BROWSER,
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},
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localeProperties: {
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/** @type {Object} */
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value:
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typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")
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? { lang: navigator.language || "en-US" }
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: null,
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kind: OptionKind.BROWSER,
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},
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nimbusDataStr: {
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/** @type {string} */
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value: "",
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kind: OptionKind.BROWSER,
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},
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supportsCaretBrowsingMode: {
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/** @type {boolean} */
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value: false,
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kind: OptionKind.BROWSER,
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},
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supportsDocumentFonts: {
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/** @type {boolean} */
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value: true,
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kind: OptionKind.BROWSER,
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},
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supportsIntegratedFind: {
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/** @type {boolean} */
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value: false,
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kind: OptionKind.BROWSER,
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},
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supportsMouseWheelZoomCtrlKey: {
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/** @type {boolean} */
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value: true,
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kind: OptionKind.BROWSER,
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},
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supportsMouseWheelZoomMetaKey: {
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/** @type {boolean} */
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value: true,
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kind: OptionKind.BROWSER,
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},
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supportsPinchToZoom: {
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/** @type {boolean} */
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value: true,
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kind: OptionKind.BROWSER,
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},
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toolbarDensity: {
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/** @type {number} */
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value: 0, // 0 = "normal", 1 = "compact", 2 = "touch"
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kind: OptionKind.BROWSER + OptionKind.EVENT_DISPATCH,
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},
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altTextLearnMoreUrl: {
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/** @type {string} */
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value:
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typeof PDFJSDev !== "undefined" && PDFJSDev.test("MOZCENTRAL")
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? "https://support.mozilla.org/1/firefox/%VERSION%/%OS%/%LOCALE%/pdf-alt-text"
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: "",
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
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},
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annotationEditorMode: {
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/** @type {number} */
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value: 0,
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
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},
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annotationMode: {
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/** @type {number} */
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value: 2,
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
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},
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cursorToolOnLoad: {
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/** @type {number} */
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value: 0,
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
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},
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debuggerSrc: {
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/** @type {string} */
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value: "./debugger.mjs",
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kind: OptionKind.VIEWER,
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},
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defaultZoomDelay: {
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/** @type {number} */
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value: 400,
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
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},
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defaultZoomValue: {
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/** @type {string} */
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value: "",
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
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},
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disableHistory: {
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/** @type {boolean} */
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value: false,
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kind: OptionKind.VIEWER,
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},
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disablePageLabels: {
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/** @type {boolean} */
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value: false,
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
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},
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enableAltText: {
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/** @type {boolean} */
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value: false,
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
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},
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enableAltTextModelDownload: {
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/** @type {boolean} */
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value: true,
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE + OptionKind.EVENT_DISPATCH,
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},
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enableGuessAltText: {
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/** @type {boolean} */
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value: true,
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE + OptionKind.EVENT_DISPATCH,
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},
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enableHighlightFloatingButton: {
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// We'll probably want to make some experiments before enabling this
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// in Firefox release, but it has to be temporary.
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// TODO: remove it when unnecessary.
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/** @type {boolean} */
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value: typeof PDFJSDev === "undefined" || PDFJSDev.test("TESTING"),
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
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},
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enableNewAltTextWhenAddingImage: {
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/** @type {boolean} */
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value: true,
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
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},
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enablePermissions: {
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/** @type {boolean} */
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value: false,
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
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},
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enablePrintAutoRotate: {
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/** @type {boolean} */
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value: true,
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
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},
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enableScripting: {
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/** @type {boolean} */
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value: typeof PDFJSDev === "undefined" || !PDFJSDev.test("CHROME"),
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
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},
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enableSignatureEditor: {
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/** @type {boolean} */
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value: typeof PDFJSDev === "undefined" || PDFJSDev.test("TESTING"),
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
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},
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enableUpdatedAddImage: {
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// We'll probably want to make some experiments before enabling this
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// in Firefox release, but it has to be temporary.
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// TODO: remove it when unnecessary.
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/** @type {boolean} */
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value: false,
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
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},
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externalLinkRel: {
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/** @type {string} */
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value: "noopener noreferrer nofollow",
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kind: OptionKind.VIEWER,
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},
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externalLinkTarget: {
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/** @type {number} */
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value: 0,
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
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},
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highlightEditorColors: {
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/** @type {string} */
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value: "yellow=#FFFF98,green=#53FFBC,blue=#80EBFF,pink=#FFCBE6,red=#FF4F5F",
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
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},
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historyUpdateUrl: {
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/** @type {boolean} */
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value: false,
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
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},
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ignoreDestinationZoom: {
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/** @type {boolean} */
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value: false,
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
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},
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imageResourcesPath: {
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/** @type {string} */
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value:
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typeof PDFJSDev !== "undefined" && PDFJSDev.test("MOZCENTRAL")
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? "resource://pdf.js/web/images/"
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: "./images/",
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kind: OptionKind.VIEWER,
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},
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maxCanvasPixels: {
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/** @type {number} */
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value: 2 ** 25,
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kind: OptionKind.VIEWER,
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},
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forcePageColors: {
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/** @type {boolean} */
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value: false,
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
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},
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pageColorsBackground: {
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/** @type {string} */
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value: "Canvas",
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
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},
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pageColorsForeground: {
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/** @type {string} */
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value: "CanvasText",
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
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},
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pdfBugEnabled: {
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/** @type {boolean} */
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value: typeof PDFJSDev === "undefined" || PDFJSDev.test("TESTING"),
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
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},
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printResolution: {
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/** @type {number} */
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value: 150,
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kind: OptionKind.VIEWER,
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},
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sidebarViewOnLoad: {
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/** @type {number} */
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value: -1,
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
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},
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scrollModeOnLoad: {
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/** @type {number} */
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value: -1,
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
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},
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spreadModeOnLoad: {
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/** @type {number} */
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value: -1,
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
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},
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textLayerMode: {
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/** @type {number} */
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value: 1,
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
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},
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viewOnLoad: {
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/** @type {boolean} */
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value: 0,
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
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},
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cMapPacked: {
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/** @type {boolean} */
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value: true,
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kind: OptionKind.API,
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},
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cMapUrl: {
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/** @type {string} */
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value:
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// eslint-disable-next-line no-nested-ternary
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typeof PDFJSDev === "undefined"
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? "../external/bcmaps/"
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: PDFJSDev.test("MOZCENTRAL")
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? "resource://pdf.js/web/cmaps/"
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: "../web/cmaps/",
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kind: OptionKind.API,
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},
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disableAutoFetch: {
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/** @type {boolean} */
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value: false,
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kind: OptionKind.API + OptionKind.PREFERENCE,
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},
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disableFontFace: {
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/** @type {boolean} */
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value: false,
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kind: OptionKind.API + OptionKind.PREFERENCE,
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},
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disableRange: {
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/** @type {boolean} */
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value: false,
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kind: OptionKind.API + OptionKind.PREFERENCE,
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},
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disableStream: {
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/** @type {boolean} */
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value: false,
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kind: OptionKind.API + OptionKind.PREFERENCE,
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},
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docBaseUrl: {
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/** @type {string} */
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value: typeof PDFJSDev === "undefined" ? document.URL.split("#", 1)[0] : "",
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kind: OptionKind.API,
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},
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enableHWA: {
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/** @type {boolean} */
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value: typeof PDFJSDev !== "undefined" && !PDFJSDev.test("MOZCENTRAL"),
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kind: OptionKind.API + OptionKind.VIEWER + OptionKind.PREFERENCE,
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},
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enableXfa: {
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/** @type {boolean} */
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value: true,
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kind: OptionKind.API + OptionKind.PREFERENCE,
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},
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fontExtraProperties: {
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/** @type {boolean} */
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value: false,
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kind: OptionKind.API,
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},
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isEvalSupported: {
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/** @type {boolean} */
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value: true,
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kind: OptionKind.API,
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},
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isOffscreenCanvasSupported: {
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/** @type {boolean} */
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value: true,
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kind: OptionKind.API,
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},
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maxImageSize: {
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/** @type {number} */
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value: -1,
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kind: OptionKind.API,
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},
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pdfBug: {
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/** @type {boolean} */
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value: false,
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kind: OptionKind.API,
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},
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standardFontDataUrl: {
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/** @type {string} */
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value:
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// eslint-disable-next-line no-nested-ternary
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typeof PDFJSDev === "undefined"
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? "../external/standard_fonts/"
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: PDFJSDev.test("MOZCENTRAL")
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? "resource://pdf.js/web/standard_fonts/"
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: "../web/standard_fonts/",
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kind: OptionKind.API,
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},
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useSystemFonts: {
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// On Android, there is almost no chance to have the font we want so we
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// don't use the system fonts in this case (bug 1882613).
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/** @type {boolean|undefined} */
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value: (
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typeof PDFJSDev === "undefined"
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? window.isGECKOVIEW
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: PDFJSDev.test("GECKOVIEW")
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)
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? false
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: undefined,
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kind: OptionKind.API,
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type: Type.BOOLEAN + Type.UNDEFINED,
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},
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verbosity: {
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/** @type {number} */
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value: 1,
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kind: OptionKind.API,
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},
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workerPort: {
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/** @type {Object} */
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value: null,
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kind: OptionKind.WORKER,
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},
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workerSrc: {
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/** @type {string} */
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value:
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// eslint-disable-next-line no-nested-ternary
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typeof PDFJSDev === "undefined"
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? "../src/pdf.worker.js"
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: PDFJSDev.test("MOZCENTRAL")
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? "resource://pdf.js/build/pdf.worker.mjs"
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: "../build/pdf.worker.mjs",
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kind: OptionKind.WORKER,
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},
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};
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if (typeof PDFJSDev === "undefined" || !PDFJSDev.test("MOZCENTRAL")) {
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defaultOptions.defaultUrl = {
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/** @type {string} */
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value:
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typeof PDFJSDev !== "undefined" && PDFJSDev.test("CHROME")
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? ""
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: "compressed.tracemonkey-pldi-09.pdf",
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kind: OptionKind.VIEWER,
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};
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defaultOptions.sandboxBundleSrc = {
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/** @type {string} */
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value:
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typeof PDFJSDev === "undefined"
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? "../build/dev-sandbox/pdf.sandbox.mjs"
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: "../build/pdf.sandbox.mjs",
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kind: OptionKind.VIEWER,
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};
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defaultOptions.viewerCssTheme = {
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/** @type {number} */
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value: typeof PDFJSDev !== "undefined" && PDFJSDev.test("CHROME") ? 2 : 0,
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
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};
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defaultOptions.enableFakeMLManager = {
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/** @type {boolean} */
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value: true,
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kind: OptionKind.VIEWER,
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};
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}
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if (typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) {
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defaultOptions.disablePreferences = {
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/** @type {boolean} */
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value: typeof PDFJSDev !== "undefined" && PDFJSDev.test("TESTING"),
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kind: OptionKind.VIEWER,
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};
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} else if (PDFJSDev.test("CHROME")) {
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defaultOptions.disableTelemetry = {
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/** @type {boolean} */
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value: false,
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kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
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};
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}
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if (typeof PDFJSDev === "undefined" || PDFJSDev.test("TESTING || LIB")) {
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// Ensure that the `defaultOptions` are correctly specified.
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for (const name in defaultOptions) {
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const { value, kind, type } = defaultOptions[name];
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if (kind & OptionKind.PREFERENCE) {
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if (kind === OptionKind.PREFERENCE) {
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throw new Error(`Cannot use only "PREFERENCE" kind: ${name}`);
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}
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if (kind & OptionKind.BROWSER) {
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throw new Error(`Cannot mix "PREFERENCE" and "BROWSER" kind: ${name}`);
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}
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if (type !== undefined) {
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throw new Error(
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`Cannot have \`type\`-field for "PREFERENCE" kind: ${name}`
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);
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}
|
|
if (typeof compatParams === "object" && compatParams.has(name)) {
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|
throw new Error(
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|
`Should not have compatibility-value for "PREFERENCE" kind: ${name}`
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|
);
|
|
}
|
|
// Only "simple" preference-values are allowed.
|
|
if (
|
|
typeof value !== "boolean" &&
|
|
typeof value !== "string" &&
|
|
!Number.isInteger(value)
|
|
) {
|
|
throw new Error(`Invalid value for "PREFERENCE" kind: ${name}`);
|
|
}
|
|
} else if (kind & OptionKind.BROWSER) {
|
|
if (type !== undefined) {
|
|
throw new Error(
|
|
`Cannot have \`type\`-field for "BROWSER" kind: ${name}`
|
|
);
|
|
}
|
|
if (typeof compatParams === "object" && compatParams.has(name)) {
|
|
throw new Error(
|
|
`Should not have compatibility-value for "BROWSER" kind: ${name}`
|
|
);
|
|
}
|
|
if (value === undefined) {
|
|
throw new Error(`Invalid value for "BROWSER" kind: ${name}`);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
class AppOptions {
|
|
static eventBus;
|
|
|
|
static #opts = new Map();
|
|
|
|
static {
|
|
// Initialize all the user-options.
|
|
for (const name in defaultOptions) {
|
|
this.#opts.set(name, defaultOptions[name].value);
|
|
}
|
|
|
|
if (typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) {
|
|
// Apply any compatibility-values to the user-options.
|
|
for (const [name, value] of compatParams) {
|
|
this.#opts.set(name, value);
|
|
}
|
|
this._hasInvokedSet = false;
|
|
|
|
this._checkDisablePreferences = () => {
|
|
if (this.get("disablePreferences")) {
|
|
// Give custom implementations of the default viewer a simpler way to
|
|
// opt-out of having the `Preferences` override existing `AppOptions`.
|
|
return true;
|
|
}
|
|
if (this._hasInvokedSet) {
|
|
console.warn(
|
|
"The Preferences may override manually set AppOptions; " +
|
|
'please use the "disablePreferences"-option to prevent that.'
|
|
);
|
|
}
|
|
return false;
|
|
};
|
|
}
|
|
}
|
|
|
|
constructor() {
|
|
if (typeof PDFJSDev === "undefined" || PDFJSDev.test("TESTING")) {
|
|
throw new Error("Cannot initialize AppOptions.");
|
|
}
|
|
}
|
|
|
|
static get(name) {
|
|
return this.#opts.get(name);
|
|
}
|
|
|
|
static getAll(kind = null, defaultOnly = false) {
|
|
const options = Object.create(null);
|
|
for (const name in defaultOptions) {
|
|
const defaultOpt = defaultOptions[name];
|
|
|
|
if (kind && !(kind & defaultOpt.kind)) {
|
|
continue;
|
|
}
|
|
options[name] = !defaultOnly ? this.#opts.get(name) : defaultOpt.value;
|
|
}
|
|
return options;
|
|
}
|
|
|
|
static set(name, value) {
|
|
this.setAll({ [name]: value });
|
|
}
|
|
|
|
static setAll(options, prefs = false) {
|
|
if (typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) {
|
|
this._hasInvokedSet ||= true;
|
|
}
|
|
let events;
|
|
|
|
for (const name in options) {
|
|
const defaultOpt = defaultOptions[name],
|
|
userOpt = options[name];
|
|
|
|
if (
|
|
!defaultOpt ||
|
|
!(
|
|
typeof userOpt === typeof defaultOpt.value ||
|
|
Type[(typeof userOpt).toUpperCase()] & defaultOpt.type
|
|
)
|
|
) {
|
|
continue;
|
|
}
|
|
const { kind } = defaultOpt;
|
|
|
|
if (
|
|
prefs &&
|
|
!(kind & OptionKind.BROWSER || kind & OptionKind.PREFERENCE)
|
|
) {
|
|
continue;
|
|
}
|
|
if (this.eventBus && kind & OptionKind.EVENT_DISPATCH) {
|
|
(events ||= new Map()).set(name, userOpt);
|
|
}
|
|
this.#opts.set(name, userOpt);
|
|
}
|
|
|
|
if (events) {
|
|
for (const [name, value] of events) {
|
|
this.eventBus.dispatch(name.toLowerCase(), { source: this, value });
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
export { AppOptions, OptionKind };
|